It is metamorphosed to greenschist facies and sits within the Kishorn Nappe, part of the Caledonian thrust belt, making its exact relationship to the other outcrops difficult to assess.
The unconformity at the base of the Sleat Group is not exposed on Skye, but at Kyle of Lochalsh, the basal part of the sequence is seen to consist of breccias, with clasts derived from the underlying gneiss.
[3] Most of the remaining part of the formation consists of coarse green trough cross-bedded sandstones, the colour coming from its content of epidote and chlorite.
The upper part of the formation is composed mainly of coarse, occasionally pebbly, trough cross-bedded sandstones, interpreted to record the building out of a series of deltas into the earlier lake.
[3] The sediments show marked cyclicity, with fining upward cycles, 25–35 m thick, with shales developed at the top.